As part of their shipbuilders' research programme, the British Ship Research Association took measurements of hull strain and launch-way pressures during the recent launch of a 30,000-tonne products carrier from the South Shields shipyard of Swan Hunter Shipbuilders. BSRA's objective is to improve the accuracy and reliability of launching calculations and to prevent structural damage to both ships and launch-ways. To this end, they have fitted strain gauges in the bottom structure of the ship and mounted pressure capsules under the aft ends of the launch-ways. As a complement to these launching measurements, BSRA also carried out a static test in which hydraulic jacks were used to apply loads to the hull bottom. The loading conditions for the jacks were selected on the basis of predictions of the likely way-end pressures to be expected during the launching and were calculated by means of the BSRA computer program "WAYE" (launch-way end pressures). The techniques are original and demanding because of the very short time which the ship takes to move down the ways. In detail, the readings will give the local strains in a transverse and the adjoining longitudinal bulkhead and longitudinals, plus the way pressures at the after end of the four ways, all of these with respect to distance travelled by the ship down the ways. These measurements will be compared with the results of a structural analysis of the ship to be undertaken by the builders. (No Further Infor in Article).

  • Corporate Authors:

    Intec Press Limited

    3 Station Parade
    Whyteleafe, Surrey,   England 
  • Publication Date: 1975-5

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Filing Info

  • Accession Number: 00098186
  • Record Type: Publication
  • Source Agency: Intec Press Limited
  • Files: TRIS
  • Created Date: Sep 30 1975 12:00AM